Squid+Proxy Transparnte = Missing

Seguinte pessoal,
To usando squid e no meu firewall ta como proxy transparente com essa linha
${IPTABLES} -t nat -A PREROUTING -i eth1 -p tcp --dport 80 -j REDIRECT --to-port 3128, ta redirecionando legal só que dá o erro ai abaixo. Mas se eu usar o proxy no browser não sendo o transparente funciona legal, alguem pode me ajudar

ERROR

The requested URL could not be retrieved

While trying to retrieve the URL: /

The following error was encountered:

Invalid URL

Some aspect of the requested URL is incorrect. Possible problems:
Missing or incorrect access protocol (should be `http://'' or similar)
Missing hostname
Illegal double-escape in the URL-Path
Illegal character in hostname; underscores are not allowed

Your cache administrator is webmaster.
Generated Fri, 02 Sep 2005 14:13:03 GMT by meudominio (squid/2.5.STABLE3)

Att

Leonardo Salgado